An image from a bone marrow smear showing a macrophage (center) with ingested red blood cells, vacuolation, and hemosiderin (iron) granules seen in a patient with a normal bone marrow (100X oil immersion).

An image from a peritoneal fluid cytospin slide demonstrating many macrophages, polymorphonuclear cells, and monocytes (60X oil immersion). Macrophages have vacuolation and a few have ingested red blood cells (bottom-left, bottom-right).